Delayed auditory feedback and the speech of stuttering and non...

25 male stutterers and 25 male non-stutterers matched by age and speaking task, read or recited under normal and 113-, 226-, 306-, 413-, 520-msec. delayed auditory feedback conditions. Changes in speaking rate and disfluency count from normal to each delayed auditory feedback condition were calculated as indicators of reaction to delayed auditory feedback. Using an analysis of variance of difference scores for speaking rate, no significant differences were found between stutterers and non-stutterers or among the delays. An analysis of variance of disfluency difference scores showed no differences between stutterers and non-stutterers. Significant differences in disfluency reaction among delay times were found.